package test.shiro.chapter06.realm;

import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;

import test.shiro.chapter06.entity.User;
import test.shiro.chapter06.service.UserService;
import test.shiro.chapter06.service.UserServiceImpl;

public class UserRealm extends AuthorizingRealm {

	private UserService userService = new UserServiceImpl();

	/**
	 * 赋予角色和权限
	 */
	@Override
	protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
		String username = (String) principals.getPrimaryPrincipal();

		SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();
		authorizationInfo.setRoles(userService.findRoles(username));
		authorizationInfo.setStringPermissions(userService.findPermissions(username));

		return authorizationInfo;
	}

	/**
	 * 身份验证
	 */
	@Override
	protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {

		String username = (String) token.getPrincipal();

		User user = userService.findByUsername(username);

		if (user == null) {
			throw new UnknownAccountException();// 没找到帐号
		}

		if (Boolean.TRUE.equals(user.getLocked())) {
			throw new LockedAccountException(); // 帐号锁定
		}

		// 交给AuthenticatingRealm使用CredentialsMatcher进行密码匹配，如果觉得人家的不好可以自定义实现
		SimpleAuthenticationInfo authenticationInfo = new SimpleAuthenticationInfo(user.getUsername(), // 用户名
				user.getPassword(), // 密码
				ByteSource.Util.bytes(user.getCredentialsSalt()), // salt=username+salt
				getName() // realm name
		);
		return authenticationInfo;
	}
}
